package com.margo.project.curator.counter;

import java.io.IOException;
import java.util.List;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;

import org.apache.curator.framework.CuratorFramework;
import org.apache.curator.framework.CuratorFrameworkFactory;
import org.apache.curator.framework.recipes.atomic.AtomicValue;
import org.apache.curator.framework.recipes.atomic.DistributedAtomicLong;
import org.apache.curator.retry.ExponentialBackoffRetry;
import org.apache.curator.retry.RetryNTimes;

import com.google.common.collect.Lists;

public class DistributedAtomicLongExample {
	private static final int QTY = 5;
	private static final String PATH = "/counter";

	public static void main(String[] args) throws IOException, Exception {

		CuratorFramework client = CuratorFrameworkFactory.newClient("localhost:2181",
				new ExponentialBackoffRetry(1000, 3));
		client.start();

		List<DistributedAtomicLong> examples = Lists.newArrayList();
		ExecutorService service = Executors.newFixedThreadPool(QTY);
		for (int i = 0; i < QTY; ++i) {
			final DistributedAtomicLong count = new DistributedAtomicLong(client, PATH, new RetryNTimes(10, 10));

			examples.add(count);
			Callable<Void> task = new Callable<Void>() {
				public Void call() throws Exception {
					try {
						// Thread.sleep(rand.nextInt(1000));
						AtomicValue<Long> value = count.increment();
						// AtomicValue<Long> value = count.decrement();
						// AtomicValue<Long> value = count.add((long)rand.nextInt(20));
						System.out.println("succeed: " + value.succeeded());
						if (value.succeeded())
							System.out.println("Increment: from " + value.preValue() + " to " + value.postValue());
					} catch (Exception e) {
						e.printStackTrace();
					}

					return null;
				}
			};
			service.submit(task);
		}

		service.shutdown();
		service.awaitTermination(10, TimeUnit.MINUTES);

	}

}
